Volcanoes are formed when magma from within the Earth's upper mantle works its way to the surface. At the surface, it erupts to form lava flows and ash deposits. Over time as the volcano continues to erupt, it will get bigger and bigger.
yellowstone volcano
when did it last erupt
21 million years ago
how and when it formed
1st of March 1872
effect on surrounding area
there is no life near the water
the oldest
MT Etna
the deadliest
Mount Vesuvius
most active volcano
Kilauea volcano
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